Q1: Chuyển sang nghi vấn

`9.` Did dad drive to work yesterday morning?

`10.` Did our parents send us an email last week?

`11.` Did they do a lot of homework yesterday?

`12.` Did you see many people on the street yesterday morning?

`13.` Did you have breakfast at 9 o'clock last Sunday?

`-` Thì quá khứ đơn:

`@` Dấu hiệu: last ... , yesterday, ago, in the past,...

`@` Cấu trúc:

`(+)` S + V-ed/ 2 + O

`(-)` S + did + not + V(b) + O

`(?)` Did + S + V(b) + O ?

$9.$ Did dad drive to work yesterday morning?

-> DHNB: yesterday morning -> Thì QKĐ

$10.$ Did our parents send us an email last week?

-> DHNB: last week -> Thì QKĐ

$11.$ Did they do a lot of homework yesterday?

-> DHNB: yesterday -> Thì QKĐ

$12.$ Did you see many people on the stress yesterday morning?

-> DHNB: yesterday morning -> Thì QKĐ

$13.$ Did you have breakfast at 9 o'clock last Sunday?

-> DHNB: last Sunday -> Thì QKĐ

=> Thì QKĐ: Với động từ thường:

(+) S + V2/ed

(?) Did + S + V(bare)? 

-> Diễn tả một hành động, sự việc đã diễn ra tại một thời điểm cụ thể, hoặc một khoảng thời gian trong quá khứ và đã kết thúc hoàn toàn ở quá khứ.